This idea has been merged into another idea. To comment or vote on this idea, please visit LATER-I-2420 Add IGTV to the preview.
I like to use the preview feature, but it leaves out videos that have been posted to Instagram. This effectively makes the preview useless, as leaving those items out gives you a distorted view of how your IG feed actually looks. So please include IGTV videos that have been posted in the preview feature.